"命门之火"是指 A．肺阳 B．心阳 C．肝阳 D．肾阳 E．脾阳

阅读理解。

     There are various reasons why cancers appear to be on the increase. For one thing, though their

sufferers are to be found in all age groups, cancers are particularly likely to attack persons in their

middle and advanced years. Naturally, since people live longer these years, there are more cancer

sufferers than before. Again, with better methods of diagnosis (诊断), doctors can more easily

recognize cancerous growths that would formerly have passed unnoticed or that would have been

wrongly diagnosed. It is also believed that certain habits and conditions of modern living, including

heavy smoking and the pollution of the air, may leave people living in more cancer-causing conditions

than before.

     We all look forward to the day when a simple medical test can find cancer while it is still small.

Researchers around the world are working on such a test. Most of their work deals with the

examination of the blood.

      Researchers in Boston have found something in the blood of cancer patients that does not

appear in healthy persons. The test showed which persons had cancer and which did not. It was

correct more than 90 percent of the time. The researchers believe the test may be able to show

cancer very clearly in its development. Cancers discovered early usually can be treated successfully.

The test examines very small bits of fat in the blood called lipids (脂质). Cancers seem to change

lipids although doctors do not know why. The test showed differences between the lipids of the

persons with cancer and the lipids of those without cancer. The researchers say the new test could

be a step to develop a simple way to check patients for cancer before the disease shows on an X-ray.

1. Who will have cancer from the study of the researchers?

A. The young.                            

B. The middle age and the older.

C. The man.                              

D. The woman.

2. The underlined words "such a test" refer to________.

A. the test that shows which persons have cancer and which don’t .

B. the test that may be able to show cancer very early in its     

    development。

C. a simple medical test that cannot find cancer when it is small

D. a new test that could be a step to develop a difficult way

3. Which of the following statements is true according to the passage?

A. Cancers have much to do with something in patients’ blood.

B. People living in better conditions are most likely to be attacked by

    cancer.

C.X-raying is the best way to determined whether a person has cancer  

   or not.

D. Cancers have nothing to do with a person’s habits and living

    conditions.

4. What would be the best title for the passage?

A. A simple way to cancer              

B. Cancers can be cured

C. How to find cancer                    

D. Early discovery of cancer

4－72型离心式通风机叶片是前向的。（）

十进制数50转换成二进制整数是( )。

A．0110110

B．0110100

C．0110010

D．0110101

联机分析处理的基本分析功能包括( )。
Ⅰ．聚类 Ⅱ．切片
Ⅲ．转轴 Ⅳ．切块

A．Ⅰ、Ⅱ和Ⅲ

B．Ⅰ、Ⅱ和Ⅳ

C．Ⅱ、Ⅲ和Ⅳ

D．都正确

GK1C机车动力制动工况时传动箱油温上升过快，制动力过大的原因有哪些？